Animal 6 Flashcards
____ allow their internal condition to change in repsonse to external changes
conformers
why are conformers able to conform (2 reasons)
- may have tolerance for greater range of physiological parameters
- in very stable environment
parameters some animals regulate
thermoregulation (temp)
osmoreuglation (body water, salinity concentration)
_____ rely on metabolism as their major heat source
endotherms`thermoregulator
_____ body temp depends on external environment
ectotherms; thermoconformers
- don`t spend energy on maintaining high metabolism
true or false: evaporation is a source of heat loss. Why
yes, water carries heat away as it evaporates from body`s surface
both ecto and endotherms have behavioural responses for heat gain and lost. intense examples:
migration, hibernation
what happens during hibernation
reduced set point of body temp, takes lots less energy
: relaxes allow diameter to increase, allowing more blood flow, look flushes, allows heat from blood to be transported away from body for cooling
vasodilation
reduces diameter of vessels, happens when trying to conserve heat as it keeps heat away from surface of body where it could be lost
vasoconstriction
how do ducks feet stay warm without insulation
“counter current” means opposing flows, currents going in different directions
veins and arteries are located right next to each other in this case. This allows heat from arteriel blood to move into vein blood. The artial blood losses heat to venus blood
– blood in core of body
is the total concentration of all of those solutes
isomolarity
a solution with higher solute concentration is a ____osmotic solution
hyperosmotic
SOLUTION WITH LOWER SOLUTE CONCENTRATION IS A ____OSMOTIIC SOLUTION
HYPOOSMOTIC
hyper and hypo osmotic refers to the fluid outside of inside cell
outside cell relative to inside cell
can osoconformers (salinity conformers) live in all types of water
no, not fresh water, too low salinity
to increase salt concentration inside their bodies, what do fresh water fish do
adds sodium to the chlorine that is actively transported into their cells
explain salt glands
glands with counter fluid exchange to get most salt out of blood
as blood moves salt ions are transferred to low solute concentrate filtrate (high to low concentration)
